Cleanest Lakes in Missoula County, Montana
Big Sky Lake South Hole in Missoula County leads the rankings with a water quality grade of A and 17.7 ft of clarity. Below are the top 14 cleanest monitored lakes in Missoula County, Montana, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Big Sky Lake South Hole | Missoula | A | 17.7 ft | 9.6 µg/L | - |
| 2 | Nla Lake | Missoula | A | 41.9 ft | 3.7 µg/L | 0.4 µg/L |
| 3 | Lake Alva Mid-Lake Deep | Missoula | A | 21.6 ft | 6.6 µg/L | - |
| 4 | Seeley Lake Middle Basin | Missoula | A | 15.4 ft | 8.1 µg/L | - |
| 5 | Placid Lake Midlake Hole | Missoula | A | 16.5 ft | 8 µg/L | - |
| 6 | Lake Inez South Hole | Missoula | A | 17.8 ft | 12.1 µg/L | - |
| 7 | Salmon Lake Mid-North Basin | Missoula | A | 17 ft | 11.3 µg/L | - |
| 8 | Holland Lake | Missoula | A | - | 4.6 µg/L | 1.5 µg/L |
| 9 | Lindbergh Lake | Missoula | A | - | 4 µg/L | 1.3 µg/L |
| 10 | Seeley Lake | Missoula | A | - | 6 µg/L | 1.6 µg/L |
| 11 | Inez Lake | Missoula | A | - | 6.6 µg/L | 1.8 µg/L |
| 12 | Big Sky Lake | Missoula | A | - | 10.2 µg/L | 2.1 µg/L |
| 13 | Alva Lake | Missoula | A | - | 4.7 µg/L | 0.9 µg/L |
| 14 | Seeley Lake South Basin | Missoula | A | 14.4 ft | 17.4 µg/L | - |